| Project/Area Number |
59540162
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
核・宇宙線・素粒子
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| Research Institution | Kagoshima University |
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Principal Investigator |
KINOSHITA Kisei Professor, Faculty of Education, Kagoshima University, 教育学部, 教授 (80037209)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Akihiro Associate Professor, College of Liberal Arts, Kagoshima University, 教養部, 助教授 (60172392)
KAGIYAMA Shigenori Professor, College of Liberal Arts, Kagoshima University, 教養部, 教授 (80094134)
MINAKA Akira Associate Professor, Faculty of Education, Kagoshima University, 教育学部, 助教授 (20136831)
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1985: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1984: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | High-energy nucleus reaction / Quark-gluon plasma / Hadron-nucleus collision / Multiple production / クォークジェット |
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| Research Abstract |
The purpose of this research was to investigate the mechanism of multi-particle production of hadrons in high-energy collisions involving nuclei, and the dynamics of quark-gluon plasma.
For this purpose, we adopted two approaches. The first is to investigate dynamical aspects of quark-gluon plasma on the basis of hydrodynamical equation. The second is to develop event generation program for multi-chain model as a standard model of nucleus collisions, so as to confront the forthcoming data of high energy nucleus-nucleus collision.
In the first approach, assuming the emergence of the quark-gluon plasma, we have analyzed its time-development on the basis of three-dimensional relativistic hydrodynamical equation of motion. As a result of numerical calculation, we found that transverse motion of the fluid have strong influence on the transverse momentum of produced hadrons and that its distribution gives an information of the initial state of the quark-gluon plasma.
In the second approach, we have studied jets in electronpositron pair annihilation using quark cascade model and analyzed heavy quark fragmentation in detail. Moreover, we constructed hadronic chain model for the analysis of high-energy collision of hadrons and/or nuclei and developed an event generation program using Monte-Carlo method. This is necessary to distinguish new phenomena such as production of quark-gluon plasma from the backgrounds. We found that this model describes dominant features in hadron-hadron collision and is also useful for the high-energy collisions involving nuclei.
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